Ultrasound acoustic metamaterials with double-negative parameters

被引：21

作者：

Chen, Huaijun ^{[1
]}

Li, Hui ^{[1
]}

Zhai, Shilong ^{[1
]}

Ding, Changlin ^{[1
]}

Li, Jiamao ^{[1
]}

Luo, Chunrong ^{[1
]}

Zhao, Xiaopeng ^{[1
]}

机构：

[1] Northwestern Polytech Univ, Smart Mat Lab, Dept Appl Phys, Xian 710129, Peoples R China

来源：

JOURNAL OF APPLIED PHYSICS | 2016年 / 119卷 / 20期

基金：

中国国家自然科学基金;

关键词：

REFRACTIVE-INDEX; METASURFACE; RESONANCES; MODULUS; WAVES;

D O I：

10.1063/1.4951008

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We experimentally demonstrate a double-negative acoustic metamaterial (AM) that combines a hollow tube and a split hollow sphere into a structurally simple perforated hollow tube with the ability to generate simultaneous resonances in water. The effective acoustic parameters extracted from the transmission and reflection coefficients confirmed that negative effective mass density and modulus were achieved from 36.68 kHz to 36.96 kHz, and the effective index was also negative in the same frequency range. In addition, further experimental measurements confirmed that the well-designed AM could realize slab focusing phenomenon. With the unique properties, the proposed AM presents potential applications in sub-wavelength imaging and medical ultrasound treatment. Published by AIP Publishing.

引用

页数：8

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